What links the two strands in a DNA helix together in the middle?

What is the atomic number of an atom that has 10 protons, 12 neutrons, and 10 electrons

Based on this plot, which of the following is the best estimate for the number of centimeters of growth that would occur if the temperature were 65°F?

In the African savanna, more wildebeests are born than the environment can support. Which is most likely to happen over a period of years as a result? A. The chances for survival of the population are reduced. B.

When a virus invades the body, some B cells recognize it as nonself and produce plasma cells that release a substance to kill the virus. What is this substance called?

Which groundwater contaminant contained in fertilizers and pesticides comes from farms? A. bacteria B. mercury C. nitrates D. sodium

What causes the patterns in the Chladni plates to differ from one another

Sugar changes into energy in a. golgi bodies b. mitochondria c. nucleus d. nucleolus

In facilitated diffusion, the carrier protein has equal affinity for the molecule being transported on both sides of the membrane.

Factors like lack of variation and environmental changes can cause a species to fail to survive. This is known as A. conservation. B. evolution. C. extinction. D. mutation.

What are the specialized parts of the phospholipid bilayer, and how do their structures relate to the structure of the plasma membrane?